PDF malware analysis — malicious · 3e2480522b08603a

MALICIOUS

PDF

12.3 KB

MD5: a878dc91ec19e18a978b124010750d16 SHA-1: dafb8318dd5c2aa357734cf10ff3714ce2254250 SHA-256: 3e2480522b08603aea42ccc0ab0fb56d80bac058c9c3e98829d9a8e1ba5ee64a

78 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF document contains embedded JavaScript, identified by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical CVE_2007_5659 heuristic indicates that the 'Collab.collectEmailInfo' JavaScript function is used to exploit a known vulnerability. This function is known to concatenate information fields and evaluate the result, likely to download and execute a secondary payload. The presence of deobfuscated JavaScript files further supports this. The exact nature of the second-stage payload cannot be determined from the provided evidence.

Heuristics 4

Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659

PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (identified after JavaScript deobfuscation)
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `1847af0a099665b6ac45af66402e56ed64237a1b287618ee3d6643267fda6f35`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19D	343 bytes
`legacy_pdfkit_stage_000.js` `7379f09a31e5b10b4fac376d1cc903940fac68c8b03a6aeec0f543932b6ab9b7`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	11954 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `0e288dbfa0bf946802266b4ff058e31f90fa9c7ec8d97d4a33c8653fb9afa776`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	4950 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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